Phosphonated Polyethylenimine‐Coated Nanoparticles: Size‐ and Zeta‐Potential‐Adjustable Nanomaterials

Abstract

Novel partially phosphonated polyethylenimine polymers are developed in order to control the modification of nanoparticle (NP) surfaces. This polymer is built by an accessible one‐step process. The numerous phosphonate functions assume both a strong covalent anchoring on metal oxide NPs and a modulation of electric charges, while amino groups are associated with dispersion preservation and subsequent biofunctionalization. The zwitterionic nanomaterials obtained display a good stability toward pH and ionic strength. According to the selected percentage of phosphonation and the polymer size, zeta potential, and diameter of the particles are controlled.

Mutual impacts and interactions of antibiotic resistance genes, microcystin synthetase genes, graphene oxide, and Microcystis aeruginosa in synthetic wastewater

“…The GO concentration range was set close to that found in natural water (Zhao et al 2020b). In these systems, GO particles had hydrodynamic diameters of 250-300 nm and zeta potentials ranges from -30 to 50 mV, indicating that the GO particles had been stably dispersed in the synthetic wastewater at the four concentrations (Monteil et al 2014). M. aeruginosa was inoculated at density of 1.0×10 5 cells/mL and the reactors were placed in an illumination incubator (MGC-300A, China) at 28.0 ± 0.5°C and 75% humidity.…”

An efficient recyclable magnetic material for the selective removal of organic pollutants

“…This amount is higher than the commercial activated charcoal (980 mg·g −1 ) and among the largest measured extracted amounts of BM dye [27]. This high q max can be attributed to the composition of NP-PEIP: PEIP represents more than 80% of the particles total weight [20], and under the same conditions maghemite does not adsorb more than 1 mg/mg. In addition, each monomeric unit of the PEIP potentially interacts with charged pollutants through amine or phosphonate groups.…”

“…In a previous work we described the synthesis, the coating of maghemite and a characterization of the physicochemical properties of the material [20,22]. As illustrated in Fig.…”

“…Phosphonated polyethylenimine (PEIP) was prepared as previously described [20–21]. An adjustment of the amounts of phosphorous acid and formaldehyde is necessary to obtain phosphonated polyethylenimine with different percentages of phosphonation (P%).…”

“…An adjustment of the amounts of phosphorous acid and formaldehyde is necessary to obtain phosphonated polyethylenimine with different percentages of phosphonation (P%). We have prepared a large range of phosphonated polyethylenimine with a percentage varying from 5 to 90% [20]. For the calculations, we have considered that a molecule of PEI is constituted of monomers (CH 2 –CH 2 –NH) n with an average molecular mass of 43.…”